Zte zpad User Manual page 129

Problem
Unable to connect
to the network
Device crashes,
reboots, freeze, or
cannot be powered
on
Possible causes
4G LTE nano-SIM card invalid.
You are not within the network's service
area.
Poor signal.
Some third-party software is not
compatible with your device.
Possible solution
Contact your service provider.
Check the service area with your
service provider.
Move to an open space, or if you are
inside a building, move closer to a
window.
Reset the device to factory status.
Uninstall the software that may cause
the problem.
Upgrade the device software.
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